A stereoselective synthetic approach to spirooxindole γ-butyrolactams is developed via N-heterocyclic carbene-catalyzed formal [3 + 2] annulation of α-bromoenals with 3-aminooxindoles. An enantioselective variant of this methodology is also investigated resulting in good substrate tolerance and high enantioselectivities.
通过N-杂环卡宾催化的α-
溴烯醛与3-
氨基氧
吲哚的正式[3 + 2]环构反应,开发了螺环
吲哚γ-丁内酰胺的立体选择性合成方法。还研究了该方法的对映选择性变体,从而产生了良好的底物耐受性和高对映选择性。